Chables a



(No Model.)

G. A. HUSSEY.

BLBGTMC ARG LAMP.

No. 260,204. Y Patented June 27, 1882.

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N. PETERS. Fnnwunmgnpher. wnxhhglen, D. c.

UNITED STATES PATENT OFFICE.

CHARLES A. HUSSEY, OF NEV YORK, N. Y., ASSPGNOR TO THE HUSSEYELEOTRIOOOMFANY, OF SAME PLAGE.

ELECTRIC-'ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 26Q,204, dated. June27, 1882.

Application filed August 31, 1881. (No model.)

i To all whom it may concern:

Be it known that l, CHARLES A. IlUssEY, of New York, in the county andState of New York, have invented certain new and useful Improvements inElectric-Arc Lamps, of which the following is a specification.

My improvements consist in the combination, with the upper and lowercarbons of an electric lamp, of an electro-magnet or solenoid and anarmature or core for controlling the lower carbon, a train ofwheel-work, a brakewheel, a brake, an electro-magnet or solenoid and anarmature or core therefor, for controlling the upper carbon, a springfor retracting said brake, and means for varying the resilience of saidspring, all arranged and operating substantially as hereinafterdescribed.

The improvements also consist in certain novel means providing foradjusting one of two carhons comprised in an electric lamp into linewith the other when desirable.

In the accompanying drawings, Figure l is a sectional elevation of anelectric lamp einbodying my improvements, parts being broken away toeconomize space in said figure. Fig. 2 is a centra-l longitudinalsection, taken in a plane at right angles to Fig. l, of a casecontaining a train ofwheels comprised in the lamp; and Fig. 3 is acentral section, taken in a plane at right angles to Fig. l, of theupper part of a case, and appurtenances containing an electro-magnet,whereby the lower carbon is operated. v

Similar letters of reference designate corresponding parts in all theiigures.

A and B respectively designate the upper and lower carbons of the lamp.The upper carbon, A, is tted into a holder, A', and secured therein by aset-screw, A2. This holder is provided at the upper end with alaterallyextending ange, which tits against a similar iiange extendinglaterally irom a socket, A3. The socket A3 its on a rod, A4, and is retained there by a set-screw, A5. The socket A3 may, by adjusting theset-screw A5, he turned around the rod A4 into and secured in differentpositions. The flanges of the said holder and socket are securedtogether vby a screw, A, passing freely through one and screwing intothe other near the circumference. Hence by loosening this screw theholder may be so adjusted relatively to the socket as to shift the uppercarbon more or less to one side. By these two adjustments the uppercarbon may at any time be adjusted into line with the lower carbon.

The rod A4 is provided longitudinally with a toothed rack, and with thisruck engages a pinion, which is comprised in a train of wheels, O,including a brake-wheel, O', preferably much larger diametrically thanthe said pinion. The periphery of this brakewheel may be faced withindia-rubher or analogous material, if desirable.

l) designates a brake consisting preferably of an arm of spring metal,which at one end impinges against the periphery ot' the brakewheel O. Itis affixed to the upper end of the core E' of a solenoid, E, which, withthe train of wheels O, is arranged in a metallic case, F, through whichlthe rod A4 works. The rod A4 extends above this case. into a tuhe,F/,which is surmounted by a cross-piece, P, which is made of wood or otherinsulating material. The solenoid E is in the electric circuit of thelamp, and hence when thecarbons burn away, so as to effect an increaseof the resistance in thc electric circuit, the solenoidE is weakened,and its core E is causedby a spring, E2, to rise and lessen the pressureof the brake upon the brake-wheel. Then the gravity of the upper carbon`and its apurtenances causes the said carbon to descend and reduce theresist ance in the electric circuit. Owin gto the train of wheels, themovement of the upper carbon in descending is rendered very slow. Assoon as the said carbon descends sufficiently to shorten the voltaic arcbetween the carbons to its norm al length the solenoid draws in its coreand applies thebrake to the brake-wheel, therea by retaining the uppercarbon in position again. Owing to the very slow movement which theupper carbon has in descending, a very delicate feeding of the saidcarbon is provided for and an extremely steady light is maintained. Themeans here shown for rais ing the core of this solenoid when thesolenoid becomes weakened consists of a spiral spring, E2, arrangedwithin the solenoid below its core and impinging against ascrew, E3,which IOO works through the bottom of the case F. By manipulating thisscrewr the spring may be vcompressed or relaxed more or less to adaptthe lamp for use with different electric currents.

The lower carbon, B, is Iitted into a holder, B', and secured there by aset-screw, B2. This holder is affixed to and entirely supported by arod, B3, which is secured to the armature G of an electro-magnet, G.This electro-magnet and its armature are arranged in a metallic case, H;but the rod Biprotrudes through the top of the same. A spring, I, ofsteel or other suitable material, aiixed to thei top ot' the case andimpinging against the under side of the armature, tends to hold it awayfrom the electromagnet, and therefore raises it whenever theelectro-magnet becomes suicientl y weakened or demagnetized.

The cases F and H are connected by tubes N, which may be made of metal,but must, in that case, be insulated from the said case-sas, forinstance, by blocks b of insulating material.

J designates wires connected with a source of electricity and leading tometal tubes K, which extend from the cross-piece P to the case F, butare insulated from the latter by blocks ct of india-rubber or othersuitable material.

lo the right-hand tube K is secured a wire, L, which leads to thesolenoid E. Thence theV circuit extends to the case F, thence throughrod A4 and carbon-holder A to the upper carbon, A. Thence the circuitextends to thelower carbon, thence through the case H to theelectro-magnet G, and thence through a wire, M, to the left-hand tube Kand wire J.

The lamp may be suspended by means of an eye, 0, aiiixed to thecross-piece P.'

When no electricity is passing through the lamp the lower carbon israised and supported by the spring I, and the upper carbon rests uponit. As soon, however, as the electricity is supplied to the lamp, thesolenoid E draws down its core E', thereby applying the brake D to thebralzewheel C' and retaining the upper carbon in position.Simultaneously the electro-magnet G draws down its armatureG', and withit the lower carbon, B, thereby forming the voltaic arc between thecarbons. Whenever the carbons burn away, so as to materially `elongatethe arc and increase the resistance in the circuit, the solenoid Eallows its core E to eii'ect the release ot' the brake-wheel C', and theupper carbon ,thereupon slowly descends until the normal length of arcand of the resistance in the circuit are established, where-1 upon theupper carbon is again secured in position.

An ordinary electro-magnet and armature may bc employed in lieu of thesolenoidE and `or a solenoid, the armature G or a core directlysupporting the lower carbon,-B, the train of wheels (l and brake-WheelCfor controlling the upper carbon, A, the solenoid E or'anelectro-magnet, the core E or an armature, the brake D, vattached to andentirely supported by said core or armature, a spring acting upon saidcore E or armature to retract said brake, and means for varying theresilience of said spring, all arranged and operating substantially asherein l described. y I

2. In an electric lamp, the combination, with one of the carbons andarod for sustaining it, of a holder, A', a` socket, A3,a setfscrew', A5,and a screw, A6, substantially as speciiled.

. C. A. HUSSEY.'

Witnesses; 'l. J. KEANE, Jas. R. BOWEN.

